Error suppression techniques for energy-efficient high-resolution SAR ADCs. (November 2020)

• Record Type: Journal Article
• Authors: Liu, Jiaxin; Tang, Xiyuan; Shen, Linxiao; Li, Shaolan; Li, Zhelu; Guo, Wenjuan; Sun, Nan
• Is Part Of: Journal of semiconductors. Volume 41:Number 11(2020)
• Publication Date: 2020-11
• Subjects: SAR ADC -- kT/C noise cancellation -- noise shaping (NS) -- mismatch error shaping (MES); Semiconductors -- Periodicals; 621.38152
• DOI: 10.1088/1674-4926/41/11/111403
• Languages: English
• ISSNs: 1674-4926

Abstract

Abstract: The successive approximation register (SAR) is one of the most energy-efficient analog-to-digital converter (ADC) architecture for medium-resolution applications. However, its high energy efficiency quickly diminishes when the target resolution increases. This is because a SAR ADC suffers from several major error source, including the sampling kT / C noise, the comparator noise, and the DAC mismatch. These errors are increasing hard to address in high-resolution SAR ADCs. This paper reviews recent advances on error suppression techniques for SAR ADCs, including the sampling kT / C noise reduction, the noise-shaping (NS) SAR, and the mismatch error shaping (MES). These techniques aim to boost the resolution of SAR ADCs while maintaining their superior energy efficiency.